Atlantic stingray

What it is

The Atlantic stingray is a small member of the Dasyatidae family. It features a spade-shaped disk that is slightly wider than it is long, with rounded corners and a notably elongated snout. Adults reach up to 61 cm in length and weigh about 5 kg. The upper surface is brown or yellowish, often with a dark midline stripe, while the underside is pale. A long, whip-like tail carries a serrated spine that regenerates yearly. Larger individuals develop thorny tubercles along their backs.

Where it lives

This species inhabits the western Atlantic Ocean, ranging from Chesapeake Bay south to Florida and into the Gulf of Mexico as far as Campeche, Mexico. It thrives in shallow coastal zones over sand or silt, typically at depths of 2 to 6 metres. Uniquely, it tolerates varying salinity levels and enters freshwater systems like the St. Johns River and Lake Pontchartrain. These river populations represent the only permanent freshwater elasmobranch group in North America. They migrate seasonally to avoid cold, moving offshore in winter.

How it lives

Feeding occurs on the sea floor, where the ray uses electroreceptive organs to locate prey buried in sediment. It faces into currents to wash away sand while hunting for worms, crustaceans, and shellfish. Predators include large sharks such as tiger and bull sharks. In freshwater habitats, American alligators may hunt them. Freshwater individuals host parasites like fish lice. Although they live in rivers, they lack the specialized salt-regulating mechanisms of true river stingrays, relying instead on high urine production to manage osmotic pressure.

Breeding and life cycle

Reproduction is viviparous, with embryos initially fed by yolk sacs before receiving uterine milk from the mother. Mating seasons run from autumn to spring, with males using modified sharp teeth to grip females during courtship. Gestation lasts four to four and a half months. Litters of one to four pups are born in late summer. Newborns measure roughly 10 to 13 cm across. Males mature at a disk width of 20 to 21 cm, while females mature slightly larger at 22 to 24 cm.

Fish and people

The species holds little commercial value for food but is popular in the aquarium trade due to its small size. Accidental encounters can result in painful wounds from the tail spine, though these are rarely fatal. Fishermen often catch them as bycatch in nets targeting flounder or trout, but most are released alive. Conservation groups consider the population stable overall. However, local freshwater groups show signs of stress and reduced reproduction linked to declining water quality in their habitats.

Status and threats

The International Union for Conservation of Nature lists this ray as Least Concern. Threats from targeted fisheries are nonexistent, and bycatch mortality remains low. The primary risk comes from environmental degradation, particularly in freshwater systems where pollution affects health and breeding success. Seasonal migrations help them avoid extreme temperatures, but habitat loss in estuaries and rivers poses a growing challenge to specific local populations.

Questions people ask about Atlantic stingray

Good reading and sources

• Atlantic stingray on WikipediaEncyclopedia
• More photos on Wikimedia CommonsPhotos
• Wikidata recordOpen data